BBC is reporting that nine people have been stabbed at event in Dublin’s Phoenix Park headlined by Swedish House Mafia, with two of the victims “seriously injured.” One 23 year-old man is in custody in conjunction with the stabbing, but investigations are ongoing to determine whether anyone else was involved. Concert promoters MCD are on record as saying that “ticket holders entering the site were subject to a search permissible by law,” adding that “every precaution… was taken to ensure the safety and security of the audience at all times.” CCTV footage from the grounds has also been handed over to police for further investigation.

As if the stabbings weren’t enough, the BBC report also states that a 20 year-old attendee died “from a suspected drugs overdose.” According to the outlet, he sought medical care on site but died later in a hospital. The victim has not yet been identified, so if you know anyone who went to the show — officials are advising friends and family to check that loved ones have gotten home safely.

This is clearly a massive tragedy, and we expect more information to continue flowing out as the story unfolds.

Update: It’s worth mentioning that this was not a pure Swedish House Mafia concert, but a larger event with other artists including Snoop Dogg, Tinie Tempah, and Calvin Harris. This article has been updated.

Update 2: SHM’s camp has released an official statement; find it below.

We played a festival in Ireland at the weekend and reports of incidents are coming to us. We didn’t see anything but have asked for all the info and are respectful of the promoter’s need to wait and give us all the clear facts. When we know more we will liase with the Festival promoter directly on what we can do to help but for now we have to respect their request to us that we remain quiet and respectful of their event safety processes. The festival itself was amazing and we had no idea this had happened and neither did the other numerous artists who played. Once we know all the facts we will deal with it in the best way we can. Thank you. Swedish House Mafia.